488
FNCA52 TJSJ 270856
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
456 AM AST TUE JAN 27 2026
DISCUSSION
KBDI VALUES CONTINUE A GRADUAL RISE ACROSS THE REGION, WITH CABO
ROJO AT 670, GUANICA AT 567, AND CAMP SANTIAGO AT 594. FUEL
MOISTURE VALUES REMAIN LOW ACROSS COASTAL SOUTHWESTERN STATIONS,
WITH 1-HR/10- HR FUELS MEASURED AT 11%/14% IN CABO ROJO, 13%/19%
IN GUANICA, AND 11%/14% IN CAMP SANTIAGO, SUPPORTING ONGOING
STRESSED VEGETATION CONDITIONS, PARTICULARLY ALONG THE
SOUTHWESTERN COASTAL PLAINS OF PUERTO RICO.
YESTERDAY, WEATHER STATIONS REPORTED RELATIVE HUMIDITIES DROPPING
SLIGHTLY BELOW OF THE THRESHOLD VALUES WITH GUSTY WIND CONDITIONS
BUT NOT AS AS MUCH AS THE PREVIOUS DAY.
TODAY, WIND SPEEDS ARE EXPECTED TO DECREASE COMPARED TO
YESTERDAY, BUT COULD STILL REACH THRESHOLD VALUES AT TIMES.
RELATIVE HUMIDITY MAY STILL BRIEFLY FALL BELOW CRITICAL LEVELS IN
LOCALIZED AREAS. THESE FACTORS COULD ALLOW FOR SHORT-LIVED AND
LOCALIZED FIRE WEATHER CONCERNS. HOWEVER, THE OVERALL FIRE WEATHER
THREAT REMAINS LOW, WITH ANY RISK EXPECTED TO BE OF LIMITED
DURATION AND SPATIAL EXTENT.
CONDITIONS WILL CONTINUE TO BE MONITORED CLOSELY THROUGHOUT THE
DAY FOR ANY CHANGES.
PRZ014-280900-
SOUTHEAST COASTAL PLAINS-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 50 0 10
TEMP (24H TREND) 86 (+1) 66 (-3) 87
RH % (24H TREND) 59 (-4) 93 (+3) 52
WIND 20FT/EARLY(MPH) E 12 G19 NE 10 E 13 G21
WIND 20FT/LATE(MPH) E 12 G19 NE 10 E 13 G21
MIXING HGT(FT-AGL/MSL)4580 5050
TRANSPORT WND (MPH) E 13 E 13
VENT RATE (KT-FT) 50380 55550
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-280900-
SOUTHERN HILLS-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 0 20
TEMP (24H TREND) 82 (+2) 63 (-4) 83
RH % (24H TREND) 65 (-4) 97 (+6) 57
WIND 20FT/EARLY(MPH) E 12 E 9 E 11
WIND 20FT/LATE(MPH) E 12 E 9 E 11
MIXING HGT(FT-AGL/MSL)4800 5510
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 48000 55100
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-280900-
NORTH COASTAL PLAINS-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 0
TEMP (24H TREND) 85 (+1) 66 (-2) 85
RH % (24H TREND) 61 (-6) 99 (+4) 58
WIND 20FT/EARLY(MPH) E 12 E 11 E 14 G17
WIND 20FT/LATE(MPH) E 12 E 11 E 14 G17
MIXING HGT(FT-AGL/MSL)4130 4660
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 41300 46600
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-280900-
NORTHERN HILLS-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 50 0 10
TEMP (24H TREND) 84 (+1) 64 (-1) 84
RH % (24H TREND) 64 (-1) 99 (+3) 55
WIND 20FT/EARLY(MPH) E 11 E 9 NE 12
WIND 20FT/LATE(MPH) E 11 E 9 NE 12
MIXING HGT(FT-AGL/MSL)4710 6180
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 37680 43260
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-280900-
WEST COAST-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 30 50
TEMP (24H TREND) 86 (0) 65 (-2) 86
RH % (24H TREND) 62 (-1) 100 (+6) 55
WIND 20FT/EARLY(MPH) E 12 E 10 SE 12
WIND 20FT/LATE(MPH) E 12 E 10 SE 12
MIXING HGT(FT-AGL/MSL)4110 4240
TRANSPORT WND (MPH) E 5 E 6
VENT RATE (KT-FT) 16440 21200
DISPERSION 5 5
DSI 5 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-280900-
EASTERN INTERIOR-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 20
TEMP (24H TREND) 83 (+2) 65 (-3) 83
RH % (24H TREND) 63 (-8) 98 (+2) 60
WIND 20FT/EARLY(MPH) E 12 E 10 E 10
WIND 20FT/LATE(MPH) E 12 E 10 E 10
MIXING HGT(FT-AGL/MSL)4210 5610
TRANSPORT WND (MPH) E 14 E 12
VENT RATE (KT-FT) 50520 56100
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-280900-
LUQUILLO MOUNTAIN RANGE-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 30
TEMP (24H TREND) 79 (+2) 64 (-3) 79
RH % (24H TREND) 67 (-8) 99 (+1) 66
WIND 20FT/EARLY(MPH) E 11 E 8 E 10
WIND 20FT/LATE(MPH) E 11 E 8 E 10
MIXING HGT(FT-AGL/MSL)4090 4190
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 44990 41900
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-280900-
CENTRAL MOUNTAIN RANGE-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 10 30
TEMP (24H TREND) 81 (+2) 61 (-3) 82
RH % (24H TREND) 64 (-3) 99 (+4) 56
WIND 20FT/EARLY(MPH) E 9 E 5 E 8
WIND 20FT/LATE(MPH) E 9 E 5 E 8
MIXING HGT(FT-AGL/MSL)5210 7610
TRANSPORT WND (MPH) E 8 SE 6
VENT RATE (KT-FT) 36470 38050
DISPERSION 5 5
DSI 5 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-280900-
CAYEY MOUNTAIN RANGE-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 20
TEMP (24H TREND) 78 (+1) 64 (-2) 78
RH % (24H TREND) 71 (-5) 99 (+2) 66
WIND 20FT/EARLY(MPH) E 10 E 6 E 10
WIND 20FT/LATE(MPH) E 10 E 6 E 10
MIXING HGT(FT-AGL/MSL)4000 4740
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 48000 52140
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-280900-
VIEQUES-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 55 (-6) 86 (-6) 56
WIND 20FT/EARLY(MPH) E 14 G18 E 12 E 12
WIND 20FT/LATE(MPH) E 14 G18 E 12 E 12
MIXING HGT(FT-AGL/MSL)3590 3520
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 50260 45760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-280900-
CULEBRA-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 40
TEMP (24H TREND) 85 (0) 73 (-1) 85
RH % (24H TREND) 57 (-7) 85 (-3) 57
WIND 20FT/EARLY(MPH) E 13 G17 E 11 E 11
WIND 20FT/LATE(MPH) E 13 G17 E 11 E 11
MIXING HGT(FT-AGL/MSL)3550 3590
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 49700 46670
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-280900-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 40
TEMP (24H TREND) 87 (+1) 66 (-3) 88
RH % (24H TREND) 56 (-4) 93 (+7) 51
WIND 20FT/EARLY(MPH) E 16 G23 E 13 G19 SE 16 G23
WIND 20FT/LATE(MPH) E 16 G23 E 13 G19 SE 16 G23
MIXING HGT(FT-AGL/MSL)4780 4830
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 47800 48300
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-280900-
SAINT THOMAS AND SAINT JOHN-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 40
TEMP (24H TREND) 85 (0) 71 (-4) 85
RH % (24H TREND) 55 (-9) 87 (-1) 55
WIND 20FT/EARLY(MPH) E 14 G17 E 12 E 13
WIND 20FT/LATE(MPH) E 14 G17 E 12 E 13
MIXING HGT(FT-AGL/MSL)3660 3680
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 54900 51520
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-280900-
ST CROIX-
456 AM AST TUE JAN 27 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 50
TEMP (24H TREND) 86 (+1) 70 (-5) 86
RH % (24H TREND) 56 (-6) 90 (+2) 56
WIND 20FT/EARLY(MPH) E 14 G18 E 12 E 14 G18
WIND 20FT/LATE(MPH) E 14 G18 E 12 E 14 G18
MIXING HGT(FT-AGL/MSL)4040 4400
TRANSPORT WND (MPH) E 18 E 18
VENT RATE (KT-FT) 64640 70400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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